Apparatus for scan rotation in image scanning equipment
US4897737A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for providing controllable scan rotation of the image representation of an original revolving in a drum scanner is disclosed, the apparatus having: illumination means defining an illuminated line segment parallel to the drum revolution axis on at least a portion of the revolving original; and a scanning head moving in parallel to the drum revolution axis in accordance with a predetermined pitch, the scanning head having: imaging apparatus for providing the image of said illuminated line segment; and deflection apparatus providing a scanning beam with a controllable sweeping motion along said illuminated line segment image so as to scan successive points of light thereon during revolution of the drum, the controllable sweeping motion being synchronized with the speed of the drum revolution so as to provide on the portion of the revolving original a locus of scanned points having an oblique angle with respect to the drum axis for rotating the image representation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.